(19)
(11) EP 0 248 421 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.12.1988 Bulletin 1988/49

(43) Date of publication A2:
09.12.1987 Bulletin 1987/50

(21) Application number: 87108064

(22) Date of filing: 04.06.1987
(84) Designated Contracting States:
DE GB

(30) Priority: 05.06.1986 JP 12925386
16.06.1986 JP 13817986
16.06.1986 JP 13818086
16.06.1986 JP 13818186

(71) Applicant: FUJI XEROX CO., LTD.
 ()

(72) Inventors:
  • Aoki,Takayoshi
     ()
  • Takeda, Masayuki
     ()
  • Suzuki, Chiaki
     ()
  • Nagatsuka, Ikutaroh
     ()

   


(54) Carrier for developer


(57) A carrier for developer is disclosed, which comprises a core having an average particle size of from 50 to 200 µm and comprising fine magnetic particles dispersed in a binder resin and a polymer overcoat having a critical surface tension of from l0 to 25 dyn/cm formed on the surface of the core. The carrier has improved chargeability, high resistance to surface soiling, and high mechanical strength.





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